Tubular conductor



y 1939- F. UNTERBUSCH 2,155,737

TUBULAR CONDUCTQR Filed Nov. 4, 1957 J. Z177 z erius c iwa en 0/Patented July 11, 1939 UNITED STATES TUBULAR CONDUCTOR FranzUnterbusch,. Cologne-Mulheim, Germany, assignor to Felten & GuilleaumeCarlswerk Actien-Gesellschaft, Cologne-Mulheim, (ier- ApplicationNovember 4,1937, Serial No. 172,847 In Germany November 26, 1936 1Claim.

It is known to build up the outer tubular conductor of a concentric highfrequency cable from a plurality of thin metal bands which are strand- 1ed with a long lay. As these bands are easily '5 displaced relatively toone another when the cable is bent, it has already been proposed to formthe abutting edges along their whole length in such a way, that alateral displacement of individual bands is rendered impossible.

10 In order further to improve, simplify and render less expensive theknown arrangements, according to the present invention the twolongitudinal edges of each band are provided at definite distances withindentations projecting at 15 right-angles to the plane of the band,which indentations may be impressed in a very simple manner, forinstance by means of a toothed wheel, and the bands are thus strandedinto a closed layer in such a manner that the indenta- 20 tions of theabutting edges of the bands are staggered relatively to one another soas to render impossible a relative displacement of individual bands.

One example of construction according to the invention is illustrated inthe accompanying 5 drawing. The thin metal bands I are provided at theiredges with indentations 2 which may be I bent inwardly as well asoutwardly.

What I claim is:

A tubular conductor consisting of a plurality 10 of metal bands eachhaving indentations along its edges at definite distances from one.another which indentations project at right-angles to the plane ofthe'band, said metal bands being stranded together with the saidprojecting indentations 15 of the abutting edges staggered relatively toone another whereby a lateral displacement of the individual bands isprevented.

FRANZ UNTERBUSCH. 2o

